Agrobase Canada
Retain B Registration expired
Dow AgroSciences - Herbicide
29557

GENERAL INFORMATION
Retain B Herbicide is a selective postemergent herbicide for the control of annual broadleaved weeds in spring wheat, durum wheat and spring barley, not underseeded with legumes. Retain B Herbicide offers a novel mode of action for controlling hard-to-kill annual broadleaved weeds such as kochia (including ALS resistant biotypes) and cleavers. Retain B Herbicide will also provide suppression of hempnettle, wild buckwheat and chickweed.

MODE OF ACTION
Retain B Herbicide is a systemic auxin-type herbicide and moves within the plant for control of exposed and underground plant tissues. The product controls weeds by disrupting normal plant growth patterns.
Symptoms of weeds include epinasty (twisting of the stems) and swollen nodes.

GENERAL USE PRECAUTIONS

Sensitive Plants
Do not apply Retain B Herbicide directly to, or otherwise permit it to come in direct contact with susceptible crops or desirable plants including alfalfa, edible beans, canola, flowers and ornamentals, lentils, lettuce, peas, potatoes, radishes, soybeans, sugar beets, sunflowers, tomatoes or tobacco.

Non-Target Sites
Do not apply where proximity of susceptible crops or other desirable plants is likely to result in exposure to spray or spray drift. See Environmental Hazards section of the label.

Crop Rotation
Fields previously treated with Retain B Herbicide can be seeded the following year to barley, canola, flax, forage grasses, lentils, mustard, oats, peas, rye or wheat or fields can be summerfallowed.

Tank Mixtures
In some cases, tank mixing a pest control product with another pest control product or a fertilizer can result in biological effects that could include, but are not limited to: reduced pest efficacy or increased host crop injury. The user should contact Dow AgroSciences Canada Inc at 1-800-667-3852 or www.dowagro.ca for information before mixing any pesticide or fertilizer that is not specifically recommended on this label. The user assumes the risk of losses that result from the use of tank mixes that do not appear on this label or that are not specifically recommended by Dow AgroSciences Canada Inc.

Spray Equipment Precaution
Do not apply through any type of irrigation system.
DO NOT APPLY BY AIR.

To Reduce Spray Drift:
Use nozzles delivering higher volumes and coarser droplets.
Use low pressures (200 to 275 kPa).
Use 100 L/ha of spray solution.
Spray when the wind velocity is 15 km/hr or less.
Spot treatments should only be applied with a calibrated boom to prevent over-application.

To Reduce Runoff from Treated Areas:
To reduce runoff from treated areas into aquatic habitats, consider the characteristics and conditions of the site before treatment. Site characteristics and conditions that may lead to runoff include, but are not limited to: heavy rainfall, moderate to steep slope, bare soil, poorly draining soil (e.g. soils that are compacted, fine textured, or low in organic matter such as clay). Avoid application of this product when heavy rain is forecast. Contamination of aquatic areas as a result of runoff may be reduced by including a vegetative strip (buffer zone) between the treated area and the edge of the water body.

Equipment Clean-Up
Equipment used to apply Retain B Herbicide should not be used to apply other pesticides to sensitive crops without thorough cleaning. Contact your Retain B Herbicide dealer for detailed equipment cleaning procedures.

DIRECTIONS FOR USE
READ THE ENTIRE LABEL BEFORE USE. FAILURE TO FOLLOW LABEL INSTRUCTIONS MAY RESULT IN ERRATIC WEED CONTROL OR CROP DAMAGE. DO NOT APPLY TO CROPS UNDERSEEDED WITH LEGUMES.

Crops Registered
spring wheat, durum wheat, spring barley

TANK-MIX COMBINATION - RETAIN B HERBICIDE + 2,4-D ESTER HERBICIDE
For control of a wide spectrum of broadleaved weeds (see following tables) apply Retain B Herbicide tank mixed with 2,4-D Ester Herbicide. Apply postemergence when weeds are in the seedling stage (2-4 leaf) and when spring wheat, durum wheat and spring barley are in the 4-leaf to flag-leaf stage. Application before the 4-leaf stage of wheat and barley may cause severe twisting of leaves and stem, and head deformities which may reduce yield up to 10%. Do not apply later than the flag-leaf stage.

Rates of Application
I. Low Rate: To control the following weeds apply a uniform spray containing 0.45 L/ha Retain B\ Herbicide and 420 g a.e./ha 2,4-D Ester Herbicide in a minimum of 100 L of water per hectare to thoroughly cover the weeds.
II. High Rate: To control the above weeds plus the additional weeds listed below, apply a uniform spray containing 0.6 L/ha of Retain B Herbicide and 560 g a.e./ha of 2,4-D Ester Herbicide in a minimum of 100 L of water per hectare to thoroughly cover the weeds.

Mixing Instructions
Add the correct amount of Retain B Herbicide to spray tank 1/2 filled with water and agitate. Add the correct amount of 2,4-D Ester Herbicide and continue to agitate.

Pre-Harvest/Grazing Intervals (Retain B Herbicide + 2,4-D Ester Herbicide)
Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest forage or cut hay within 30 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.
Do not harvest the treated mature crop within 60 days after application.


TANK-MIX COMBINATIONS - RETAIN B HERBICIDE + 2,4-D ESTER HERBICIDE + OTHER HERBICIDES
Tank mixtures of Retain B Herbicide + 2,4-D Ester Herbicide with other herbicides will provide control of additional weeds. For products which may be tank mixed with Retain B Herbicide + 2,4-D Ester Herbicide and the additional weeds controlled see following table. Follow all precautions, minimal interval to harvest and directions for use on the Retain B Herbicide and tank-mix partner labels.

RESISTANCE MANAGEMENT RECOMMENDATIONS
For resistance management, Retain B Herbicide is a Group 4 herbicide. Any weed population may contain or develop plants naturally resistant to Retain B Herbicide and other Group 4 herbicides. The resistant biotypes may dominate the weed population if these herbicides are used repeatedly in the same field. Other resistance mechanisms that are not linked to site of action, but specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance-management strategies should be followed.
To delay herbicide resistance:
Where possible, rotate the use of Retain B Herbicide or other Group 4 herbicides with different herbicide groups that control the same weeds in a field.
Use tank mixtures with herbicides from a different group when such use is permitted.
Herbicide use should be based on an IPM program that includes scouting, historical information related to herbicide use and crop rotation, and considers tillage (or other mechanical), cultural, biological and other chemical control practices.
Monitor treated weed populations for resistance development.
Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment and planting clean seed.
Contact your local extension specialist or certified crop advisors for any additional pesticide resistance-management and/or integrated weed-management recommendations for specific crops and weed biotypes.
For further information or to report suspected resistance, contact
Loveland Products Canada Inc. at 1-800-328-4678.

Effective
Crops
Winter wheat
BBCH
0 - 0
Registred norm
0.45 - 0.6
Preharvest Interval
60
Crops
Spring wheat
BBCH
0 - 0
Registred norm
0.45 - 0.6
Preharvest Interval
60
Crops
Spring barley
BBCH
0 - 0
Registred norm
0.45 - 0.6
Preharvest Interval
60
Effective
Ball mustard
Ball mustard
Neslia paniculata ★★★
Black bindweed
Black bindweed
Fallopia convolvulus ★★★
Black mustard
Black mustard
Brassica nigra ★★★
Calepina
Calepina
Calepina irregularis ★★★
Cleavers
Cleavers
Galium aparine ★★★
Cocklebur
Cocklebur
Xanthium strumarium ★★★
Common burdock
Common burdock
Arctium minus ★★★
Common ragweed
Common ragweed
Ambrosia artemisiifolia ★★★
European stickseed
European stickseed
Lappula squarrosa ★★★
Fat hen
Fat hen
Chenopodium album ★★★
Field horsetail
Field horsetail
Equisetum arvense ★★★
Field mustard
Field mustard
Brassica campestris ★★★
Flixweed
Flixweed
Descurainia sophia ★★★
Goat’s-beard
Goat’s-beard
Aruncus dioicus ★★★
Hare's ear mustard
Hare's ear mustard
Conringia orientalis ★★★
Hedge mustard
Hedge mustard
Sisymbrium officinale ★★★
Hoary cress
Hoary cress
Lepidium draba ★★★
Indian hedge mustard
Indian hedge mustard
Sisymbrium orientale ★★★
Jimson weed
Jimson weed
Datura stramonium ★★★
Kochia
Kochia
Bassia scoparia ★★★
Plantain
Plantain
Musa paradisiaca ★★★
Prickly lettuce
Prickly lettuce
Lactuca serriola ★★★
Shepherd's purse
Shepherd's purse
Capsella bursa-pastoris ★★★
Sunflowers
Sunflowers
Helianthus ★★★
Tumble mustard
Tumble mustard
Sisymbrium altissimum ★★★
Vetches
Vetches
Vicia ★★★
Volunteer canola
Volunteer canola
Brassica napus ★★★
White mustard
White mustard
Sinapis alba ★★★
Wild mustard, charlock
Wild mustard, charlock
Sinapis arvensis ★★★
Wild radish
Wild radish
Raphanus raphanistrum ★★★
Wormseed mustard
Wormseed mustard
Erysimum cheiranthoides ★★★
Blue lettuce
Blue lettuce
Lactuca tatarica ★★
Common dandelion
Common dandelion
Taraxacum officinale ★★
Docks
Docks
Rumex acetosella ★★
Dog mustard
Dog mustard
Erucastrum gallicum ★★
European bindweed
European bindweed
Convolvulus arvensis ★★
Grindelia
Grindelia
Grindelia camporum ★★
Hairy galinsoga
Hairy galinsoga
Galinsoga quadriradiata ★★
Hedge bindweed
Hedge bindweed
Calystegia sepium ★★
Leafy spurge
Leafy spurge
Euphorbia esula ★★
Oak-leaved goosefoot
Oak-leaved goosefoot
Chenopodium glaucum ★★
Pepper grass
Pepper grass
Panicum whitei ★★
Redroot pigweed
Redroot pigweed
Amaranthus retroflexus ★★
Redstem filaree
Redstem filaree
Erodium cicutarium ★★
Round-leaved mallow
Round-leaved mallow
Malva pusilla ★★
Russian thistle
Russian thistle
Salsola kali ★★
Tansy mustard
Tansy mustard
Descurainia pinnata ★★
Tartary buckwheat
Tartary buckwheat
Fagopyrum tataricum ★★
Volunteer flax
Volunteer flax
Linum usitatissimum ★★
Canada thistle
Canada thistle
Cirsium arvense ★
Common chickweed
Common chickweed
Stellaria media ★
Common hempnettle
Common hempnettle
Galeopsis tetrahit ★
Smooth sowthistle
Smooth sowthistle
Sonchus oleraceus ★
Sowthistle
Sowthistle
Sonchus spp. ★